2 * ---------------------------------------------------------------------------
6 * Implements the f/w related HIP core lib API.
7 * It is part of the porting exercise in Linux.
9 * Also, it contains example code for reading the loader and f/w files
10 * from the userspace and starting the SME in Linux.
12 * Copyright (C) 2005-2009 by Cambridge Silicon Radio Ltd.
14 * Refer to LICENSE.txt included with this source code for details on
17 * ---------------------------------------------------------------------------
19 #include <linux/kmod.h>
20 #include <linux/vmalloc.h>
21 #include <linux/firmware.h>
22 #include <asm/uaccess.h>
23 #include "csr_wifi_hip_unifi.h"
24 #include "csr_wifi_hip_unifi_udi.h"
26 #include "unifi_priv.h"
29 * ---------------------------------------------------------------------------
31 * F/W download. Part of the HIP core API
33 * ---------------------------------------------------------------------------
38 * ---------------------------------------------------------------------------
41 * Returns a structure to be passed in unifi_fw_read().
42 * This structure is an OS specific description of the f/w file.
43 * In the linux implementation it is a buffer with the f/w and its' length.
44 * The HIP driver calls this functions to request for the loader or
46 * The structure pointer can be freed when unifi_fw_read_stop() is called.
49 * ospriv Pointer to driver context.
50 * is_fw Type of firmware to retrieve
51 * info Versions information. Can be used to determine
52 * the appropriate f/w file to load.
55 * O on success, non-zero otherwise.
57 * ---------------------------------------------------------------------------
60 unifi_fw_read_start(void *ospriv, s8 is_fw, const card_info_t *info)
62 unifi_priv_t *priv = (unifi_priv_t*)ospriv;
65 if (is_fw == UNIFI_FW_STA) {
66 /* F/w may have been released after a previous successful download. */
67 if (priv->fw_sta.dl_data == NULL) {
68 unifi_trace(priv, UDBG2, "Attempt reload of sta f/w\n");
69 uf_request_firmware_files(priv, UNIFI_FW_STA);
71 /* Set up callback struct for readfunc() */
72 if (priv->fw_sta.dl_data != NULL) {
77 unifi_error(priv, "downloading firmware... unknown request: %d\n", is_fw);
81 } /* unifi_fw_read_start() */
86 * ---------------------------------------------------------------------------
89 * Called when the HIP driver has finished using the loader or
91 * The firmware buffer may be released now.
94 * ospriv Pointer to driver context.
95 * dlpriv The pointer returned by unifi_fw_read_start()
97 * ---------------------------------------------------------------------------
100 unifi_fw_read_stop(void *ospriv, void *dlpriv)
102 unifi_priv_t *priv = (unifi_priv_t*)ospriv;
103 struct dlpriv *dl_struct = (struct dlpriv *)dlpriv;
105 if (dl_struct != NULL) {
106 if (dl_struct->dl_data != NULL) {
107 unifi_trace(priv, UDBG2, "Release f/w buffer %p, %d bytes\n",
108 dl_struct->dl_data, dl_struct->dl_len);
110 uf_release_firmware(priv, dl_struct);
113 } /* unifi_fw_read_stop() */
117 * ---------------------------------------------------------------------------
118 * unifi_fw_open_buffer
120 * Returns a handle for a buffer dynamically allocated by the driver,
121 * e.g. into which a firmware file may have been converted from another format
122 * which is the case with some production test images.
124 * The handle may then be used by unifi_fw_read() to access the contents of
128 * ospriv Pointer to driver context.
129 * fwbuf Buffer containing firmware image
130 * len Length of buffer in bytes
133 * Handle for buffer, or NULL on error
134 * ---------------------------------------------------------------------------
137 unifi_fw_open_buffer(void *ospriv, void *fwbuf, u32 len)
139 unifi_priv_t *priv = (unifi_priv_t*)ospriv;
144 priv->fw_conv.dl_data = fwbuf;
145 priv->fw_conv.dl_len = len;
146 priv->fw_conv.fw_desc = NULL; /* No OS f/w resource is associated */
148 return &priv->fw_conv;
152 * ---------------------------------------------------------------------------
153 * unifi_fw_close_buffer
155 * Releases any handle for a buffer dynamically allocated by the driver,
156 * e.g. into which a firmware file may have been converted from another format
157 * which is the case with some production test images.
161 * ospriv Pointer to driver context.
162 * fwbuf Buffer containing firmware image
165 * Handle for buffer, or NULL on error
166 * ---------------------------------------------------------------------------
168 void unifi_fw_close_buffer(void *ospriv, void *fwbuf)
173 * ---------------------------------------------------------------------------
176 * The HIP driver calls this function to ask for a part of the loader or
180 * ospriv Pointer to driver context.
181 * arg The pointer returned by unifi_fw_read_start().
182 * offset The offset in the file to return from.
183 * buf A buffer to store the requested data.
184 * len The size of the buf and the size of the requested data.
187 * The number of bytes read from the firmware image, or -ve on error
188 * ---------------------------------------------------------------------------
191 unifi_fw_read(void *ospriv, void *arg, u32 offset, void *buf, u32 len)
193 const struct dlpriv *dlpriv = arg;
195 if (offset >= dlpriv->dl_len) {
200 if ((offset + len) > dlpriv->dl_len) {
201 /* attempt to read past end of file */
205 memcpy(buf, dlpriv->dl_data+offset, len);
209 } /* unifi_fw_read() */
214 #define UNIFIHELPER_INIT_MODE_SMEUSER 2
215 #define UNIFIHELPER_INIT_MODE_NATIVE 1
218 * ---------------------------------------------------------------------------
221 * Ask userspace to send us firmware for download by running
222 * '/usr/sbin/unififw'.
223 * The same script starts the SME userspace application.
224 * Derived from net_run_sbin_hotplug().
227 * priv Pointer to OS private struct.
231 * ---------------------------------------------------------------------------
234 uf_run_unifihelper(unifi_priv_t *priv)
237 char *prog = "/system/bin/unififw";
239 char *prog = "/usr/sbin/unififw";
240 #endif /* ANDROID_BUILD */
242 char *argv[6], *envp[4];
247 #if (defined CSR_SME_USERSPACE) && (!defined CSR_SUPPORT_WEXT)
248 unifi_trace(priv, UDBG1, "SME userspace build: run unifi_helper manually\n");
252 unifi_trace(priv, UDBG1, "starting %s\n", prog);
254 snprintf(inst_str, 8, "%d", priv->instance);
255 #if (defined CSR_SME_USERSPACE)
256 snprintf(init_mode, 8, "%d", UNIFIHELPER_INIT_MODE_SMEUSER);
258 snprintf(init_mode, 8, "%d", UNIFIHELPER_INIT_MODE_NATIVE);
259 #endif /* CSR_SME_USERSPACE */
263 argv[i++] = inst_str;
264 argv[i++] = init_mode;
267 /* Don't add more args without making argv bigger */
269 /* minimal command environment */
271 envp[i++] = "HOME=/";
272 envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
274 /* Don't add more without making envp bigger */
276 unifi_trace(priv, UDBG2, "running %s %s %s\n", argv[0], argv[1], argv[2]);
278 r = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
281 } /* uf_run_unifihelper() */
283 #ifdef CSR_WIFI_SPLIT_PATCH
284 static u8 is_ap_mode(unifi_priv_t *priv)
286 if (priv == NULL || priv->interfacePriv[0] == NULL)
291 /* Test for mode requiring AP patch */
292 return(CSR_WIFI_HIP_IS_AP_FW(priv->interfacePriv[0]->interfaceMode));
297 * ---------------------------------------------------------------------------
298 * uf_request_firmware_files
300 * Get the firmware files from userspace.
303 * priv Pointer to OS private struct.
304 * is_fw type of firmware to load (UNIFI_FW_STA/LOADER)
308 * ---------------------------------------------------------------------------
310 int uf_request_firmware_files(unifi_priv_t *priv, int is_fw)
312 /* uses the default method to get the firmware */
313 const struct firmware *fw_entry;
315 #define UNIFI_MAX_FW_PATH_LEN 32
316 char fw_name[UNIFI_MAX_FW_PATH_LEN];
319 #if (defined CSR_SUPPORT_SME) && (defined CSR_SUPPORT_WEXT)
320 if (priv->mib_data.length) {
321 vfree(priv->mib_data.data);
322 priv->mib_data.data = NULL;
323 priv->mib_data.length = 0;
325 #endif /* CSR_SUPPORT_SME && CSR_SUPPORT_WEXT*/
327 postfix = priv->instance;
329 if (is_fw == UNIFI_FW_STA) {
330 /* Free kernel buffer and reload */
331 uf_release_firmware(priv, &priv->fw_sta);
332 #ifdef CSR_WIFI_SPLIT_PATCH
333 scnprintf(fw_name, UNIFI_MAX_FW_PATH_LEN, "unifi-sdio-%d/%s",
334 postfix, (is_ap_mode(priv) ? "ap.xbv" : "staonly.xbv") );
336 scnprintf(fw_name, UNIFI_MAX_FW_PATH_LEN, "unifi-sdio-%d/%s",
337 postfix, "sta.xbv" );
339 r = request_firmware(&fw_entry, fw_name, priv->unifi_device);
341 priv->fw_sta.dl_data = fw_entry->data;
342 priv->fw_sta.dl_len = fw_entry->size;
343 priv->fw_sta.fw_desc = (void *)fw_entry;
345 unifi_trace(priv, UDBG2, "Firmware file not available\n");
351 } /* uf_request_firmware_files() */
354 * ---------------------------------------------------------------------------
355 * uf_release_firmware_files
357 * Release all buffers used to store firmware files
360 * priv Pointer to OS private struct.
364 * ---------------------------------------------------------------------------
366 int uf_release_firmware_files(unifi_priv_t *priv)
368 uf_release_firmware(priv, &priv->fw_sta);
374 * ---------------------------------------------------------------------------
375 * uf_release_firmware
377 * Release specific buffer used to store firmware
380 * priv Pointer to OS private struct.
381 * to_free Pointer to specific buffer to release
385 * ---------------------------------------------------------------------------
387 int uf_release_firmware(unifi_priv_t *priv, struct dlpriv *to_free)
389 if (to_free != NULL) {
390 release_firmware((const struct firmware *)to_free->fw_desc);
391 to_free->fw_desc = NULL;
392 to_free->dl_data = NULL;